Tesla Megapack 3 production starts at Texas Megafactory, 50 GWh

Tesla’s new Texas Megafactory has begun shipping the 5 MWh Megapack 3, with the plant designed to produce 50 GWh of these grid batteries each year, a step that could outpace its car division’s growth trajectory [1]. The move matters because it gives Tesla a dedicated, high‑density storage line that rivals CATL and BYD are also scaling, and it positions the company to meet a $5 billion Megapack order from Europe’s NatPower [1].

Megapack 3 specs and the Megablock advantage

Megapack 3 packs 5 MWh of energy into the same footprint as the 3.9 MWh Megapack 2 XL, achieved by switching to a larger 2.8‑liter cell format [1]. The redesign also slashes thermal‑system connections by 78%, reducing potential leak points and assembly labor. The new “Megablock” bundles up to four Megapack 3 units (≈20 MWh) with factory‑installed transformers and switchgear, allowing Tesla to claim 248 MWh per acre and to deploy 1 GWh in 20 business days—about 23% faster than the prior field‑assembly method [1]. This factory‑integrated approach mirrors the efficiency gains Tesla previously realized with its Supercharger rollout.

Market context and competitive pressure

The Brookshire plant, built in just 16 months, could become Tesla’s largest energy‑storage fab, surpassing the output of its Lathrop, California site [1]. The 50 GWh target is a direct response to mounting competition from CATL, Fluence and BYD, which are all expanding capacity in the grid‑storage segment [1]. Analysts value Tesla’s energy arm at roughly A$200 billion, a figure that already exceeds most Australian listed firms and sits just below mining giant BHP [2]. Morgan Stanley projects the energy business to generate about $7 billion in revenue for fiscal 2024, with Megapack deployments expected to rise from the current 16 GWh to 90 GWh by 2030 [2]. The recent $5 billion, 25 GWh contract with NatPower underscores growing demand for higher‑density, faster‑to‑deploy storage solutions [1].

What to watch

• First full‑year output: Whether the Brookshire factory reaches its 50 GWh target in the upcoming fiscal year.
• Megablock rollout: Adoption rate of the bundled Megablock solution versus traditional field‑assembled Megapacks.
• Supply chain dynamics: Availability of large‑format cells and the impact of U.S. tariffs on LFP imports on Tesla’s ability to meet production goals [1].

Tesla’s ability to scale Megapack 3 production quickly could cement its lead in grid‑storage density and speed, but the ultimate test will be securing enough large‑format cells and navigating tariff pressures while competitors accelerate their own high‑capacity offerings.